Wade Robson's Getting

PAID TO LIE

5/23/2013 12:50 AM PDT BY TMZ STAFF

Joe was at the airport in L.A. Wednesday when we asked about Wade's claims against the MJ estate -- that the singer sexually abused him as a child for years -- but Joe doesn't buy Wade's story for a second ... and he's not placing the blame entirely on Wade's shoulders either.

Joe's got his own conspiracy theory about who's REALLY behind Wade's allegations ... and whoever it is has a massive wallet.